This cobalt drill bit is a great addition, perhaps a necessity, to your drill bit selection. It measures 17/64 inches and is sold individually at an economic price for your convenience in stocking, or replacing your tools and accessories if need by. It is made by the trusted name of Copperfield and suggested by them for mounting the top and bottom support brackets for the Home Saver brand. It can also serve in any other capacity for which this sized drill bit is needed.